Effects of photocatalytic reactions on marine plankton: Titanium dioxide powder as catalyst on the body surface

Citation
S. Matsuo et al., Effects of photocatalytic reactions on marine plankton: Titanium dioxide powder as catalyst on the body surface, J ENVIR S A, 36(7), 2001, pp. 1419-1425
Citations number
8
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
ISSN journal
1093-4529 → ACNP
Volume
36
Issue
7
Year of publication
2001
Pages
1419 - 1425
Database
ISI
SICI code
1093-4529(2001)36:7<1419:EOPROM>2.0.ZU;2-2
Abstract
Photocatalytic effects of TiO2 powder on marine plankton were examined by t he use of either brine shrimp Artemia salina or noxious red tide flagellate Chattonella antiqua as a probe. After UV (365 nm) irradiation for ca. I ho ur, A. salina stopped moving and the body surface was completely covered by TiO2 powder. Similar photoirradiation of C. antiqua, on the other hand, in duced deformation of the body from spindle to round shape within 20 minutes . The deformed C. antiqua recovered to normal shapes, when the cells were k ept in the same conditions but without UV irradiation for more than 40 minu tes. On the prolonged U-V irradiation (more than 100 minutes), however, the cells burst and came to annihilation. The photocatalytic reactions of TiO2 on the body surface are thus concluded to induce fatal damages to these mi croorganisms.